Improvement in treating glue-stock



UNITED STATES PATENT O FICE,

CHAS. W. COOPER, OF BROOKLYN, E. 1)., NEWYORK.

IMPROVEMENT lN TREATING GLUE-STOCK.

Specification forming part of Letters Patent No. 49.383, dated August15, 1865. a

To all whom it may concern:

Be it known that I, (JIIARLEs W. COOPER, of Brooklyn, in the county ofKings and State of New York, have invented a new and useful Improvementin Treating Glue-Stock; and I do hereby declare that the following isafull, clear, and exact description thereof, which will enable othersskilled in the artto fully understand and make use of the same.

The object of this invention is to extract from the residuum ofglue-stock such grease which, after said glue-stock has been acted uponby lime, remains in chemical combination with said lime, and which,being of a pasty consistency and not soluble at boiling-heat, remainsmixed with the hair and other waste portion of the stock after the gluehas been extracted.

This residuum of hair, grease, lime, &c., is

The manner in which I carry out my process is as follows: After the gluehas all been extracted from the stock in the usual manner I place theresiduum in a vessel filled with water and heat the mass to aboiling-heat. I then mix in sulphuric or other aeidequal toor slightlyin excess of the quantity which will be neutralized, and keep the wholemass well stirred until all the lime previously in combination with thegrease has been converted into a sulphate or other salt, according tothe kind of acid used. The grease, being thus set free, re-

sumes the culinary condition of animal oils,

scribed.

CHAS. W. COOPER.

Witnesses:

M. M. LIVINGSTON, O. L. TOPLIFF.

